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Image Display Apparatus, Video Signal Processor, and Video Signal Processing Method

a technology of image display and video signal, which is applied in the direction of color television with bandwidth reduction, television system, instruments, etc., can solve the problems of user discomfort, loss of film signal taste, and weakening so as to suppress the deterioration of picture quality, reduce judder, and weaken the degree of judder reduction

Active Publication Date: 2010-02-11
SATURN LICENSING LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0021]The present invention has been achieved in view of such issues, and its first object is to provide an image display apparatus, a video signal processor, and a video signal processing method capable of weakening the degree of reduction of a judder while reducing the judder at the time of converting frame rate of a film signal (cinema signal) using motion compensation.
[0022]A second object of the present invention is to provide an image display apparatus, a video signal processor, and a video signal processing method capable of suppressing deterioration in picture quality due to detection precision of a motion vector at the time of performing a predetermined video signal process for improving picture quality.
[0023]Further, a third object of the present invention is to provide an image display apparatus capable of reducing a hold blur in accordance with circumstances.

Problems solved by technology

As a result, a person accustomed to a judder in a film signal gets an impression that the taste of the film signal is lost.
In such a case, there is a problem that since a large judder suddenly occurs while the user is watching a video image in which motion is very smooth, the user feels discomfort.
However, a technique of weakening the degree of reduction of a judder while reducing the judder at the time of converting the frame rate of a film signal is not proposed.

Method used

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  • Image Display Apparatus, Video Signal Processor, and Video Signal Processing Method
  • Image Display Apparatus, Video Signal Processor, and Video Signal Processing Method
  • Image Display Apparatus, Video Signal Processor, and Video Signal Processing Method

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first embodiment

[0090]FIG. 5 is a block diagram showing an example of the circuit configuration of a video signal processor (video signal processor 4) according to a first embodiment of the present invention. The video signal processor 4 is built in a television receiver. A digital component signal YUV subjected to processes such as tuning and decoding by a tuner, a decoder, and the like which are not shown is supplied to the video signal processor 4.

[0091]The digital component signal YUV supplied to the video signal processor 4 is input to a preprocessor 41 and sequentially written to a memory 43 via a memory controller 42.

[0092]The preprocessor 41 performs a process of separating a luminance signal Y from the digital component signal YUV. The luminance signal Y separated by the preprocessor 41 is also sequentially written in the memory 43 via the memory controller 42.

[0093]The luminance signal Y written in the memory 43 is sequentially read by the memory controller 42 (as shown in FIGS. 2 and 3, ...

second embodiment

[0153]A second embodiment of the present invention will now be described.

[0154]FIG. 13 shows an example of the configuration of a video signal processor (video signal processor 4B) of the second embodiment. The same reference numerals are designated to the same components as those of the foregoing embodiment, and their description will not be repeated.

[0155]The video signal processor 4B executes various image processes on moving image data in an access unit basis. The access unit is a unit of a moving image such as a frame or a field and, concretely, refers to, for example, an entire frame or a part of a frame constituting a moving image. In this case, the frame denotes here a single stationary image. Therefore, the entire frame corresponds to a frame. However, in the following, for simplicity of explanation, it is assumed that the video signal processor 4B executes various image processes on moving image data on the frame unit basis.

[0156]As shown in FIG. 13, the video signal proce...

third embodiment

[0424]A third embodiment of the present invention will now be described.

[0425]FIG. 43 shows an example of the configuration of a video signal processor (video signal processor 4D) in the third embodiment. In this case, the same reference numerals are designated to the same components as those in the foregoing embodiments and their description will not be repeated.

[0426]The video signal processor 4D is obtained by further providing the video signal processor 4B described in the second embodiment with an overdrive processor 10 and performs video signal processes in the interpolation section 45, the imaging blur suppression processor 13, and the overdrive processor 10 in consideration of the reliability in detection of a motion vector mv in the motion vector detector 44. In addition, in the case of detecting a motion vector also in the imaging blur characteristic detector 12, reliability in detection of the motion vector may be considered. In the embodiment, the case where the imaging ...

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Abstract

The present invention provides an image display apparatus capable of reducing a judder and simultaneously weakening the degree of reducing the judder at the time of converting frame rate of a film signal using motion compensation. At the time of converting frame rate of a video signal by adding N (N: integer of 2 or larger) interpolation frames into between original frames neighboring each other along time base obtained from video images in original frames by using motion compensation so that interpolation positions of the video images in the N interpolation frames are set to a deviated position which is closer to the nearest video image in the original frames rather than positions obtained by equally dividing, into (N+1) portions, magnitude of video image motion between an earlier original frame and a following original frame along the time base.

Description

TECHNICAL FIELD[0001]The present invention relates to a video signal processor and a video signal processing method for converting frame rate of a video signal using motion compensation and to an image display apparatus having such a video signal processor.BACKGROUND ART[0002]As one of video signal processes for improving picture quality in a television receiver, a DVD player, and the like there is frame rate conversion using motion compensation.[0003]The principle of frame rate conversion will be described using FIGS. 1 to 3 with respect to a video signal captured by a camera for television broadcast (hereinbelow, called a camera signal) and a video signal obtained by telecine converting a film to a television system (hereinbelow, called film signal or cinema signal).[0004]FIG. 1(a) shows original frames A, B, C, and D of a camera signal of an NTSC system. In the case of converting the frame rate of the camera signal to 120 Hz, as shown in FIG. 1(b), an interpolation frame is added...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04N7/26G02F1/133G09G3/20G09G3/34G09G3/36H04N5/44H04N5/66
CPCG09G3/3406H04N7/0132G09G2310/024G09G2310/061G09G2320/0261G09G2320/0606G09G2320/062G09G2320/0626G09G2320/106G09G2340/0435G09G2360/144G09G2360/16H04N5/145H04N7/0112H04N7/012G09G3/3648G09G3/36H04N5/208H04N5/66
Inventor MIYAZAKI, SHINICHIROMURAKAMI, ICHIRONISHI, TORU
Owner SATURN LICENSING LLC
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